25644090 has 32 divisors (see below), whose sum is σ = 61765056. Its totient is φ = 6814080.

The previous prime is 25644089. The next prime is 25644119. The reversal of 25644090 is 9044652.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8025 + ... + 10755.

It is an arithmetic number, because the mean of its divisors is an integer number (1930158).

Almost surely, 2^25644090 is an apocalyptic number.

25644090 is an abundant number, since it is smaller than the sum of its proper divisors (36120966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25644090 is a wasteful number, since it uses less digits than its factorization.

25644090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 25644090 is about 5063.9994075829. Note that the first 3 decimals coincide. The cubic root of 25644090 is about 294.8916196717.

The spelling of 25644090 in words is "twenty-five million, six hundred forty-four thousand, ninety".